[
https://issues.apache.org/jira/browse/CALCITE-3286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16914692#comment-16914692
]
Julian Hyde commented on CALCITE-3286:
--------------------------------------
Work in progress:
https://github.com/julianhyde/calcite/tree/3286-join-on-expressions
> In LatticeSuggester, allow join conditions that use expressions
> ---------------------------------------------------------------
>
> Key: CALCITE-3286
> URL: https://issues.apache.org/jira/browse/CALCITE-3286
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Priority: Major
>
> In {{LatticeSuggester}}, allow join conditions that use expressions. For
> example, the query
> {code}
> select *
> from emp
> join dept on emp.deptno + 1 = dept.deptno
> {code}
> uses an expression "emp.deptno + 1" on the "emp" side of the join key.
> Currently this query throws:
> {noformat}
> java.lang.ClassCastException: class
> org.apache.calcite.materialize.LatticeSuggester$DerivedColRef cannot be cast
> to class org.apache.calcite.materialize.LatticeSuggester$BaseColRef
> at
> org.apache.calcite.materialize.LatticeSuggester.frame(LatticeSuggester.java:478)
> at
> org.apache.calcite.materialize.LatticeSuggester.frame(LatticeSuggester.java:420)
> at
> org.apache.calcite.materialize.LatticeSuggester.frame(LatticeSuggester.java:399)
> at
> org.apache.calcite.materialize.LatticeSuggester.addQuery(LatticeSuggester.java:124)
> {noformat}
--
This message was sent by Atlassian Jira
(v8.3.2#803003)
